Access Virus Ti2 Polar - dual DSP system with over 80 stereo voices, VirusControl plug-in (VST and AU) for Windows XP and Mac OS X (for integration into a software sequencer), 129x parallel effects, 6x balanced outputs with +4dB level and switchable soft limiting algorithm. Studio grade 192kHz D/A converters with SPDIF digital I/O. 2x 24bit inputs. Surround sound compatible, programmable arpeggiator for all patches. Extended memory: 512 RAM patches and 2048 ROM patches (re-writable), compatible with USB 2.0 (USB and high-speed USB devices), quality synth-action keyboard with 37 keys, velocity response and aftertouch, 2x pedal inputs.